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layout: docs
title: Overview
headline: 'Documentation'
bodyclass: docs
---
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      <p class="lead col-sm-8">Welcome to the developer documentation for gRPC.
      Here you can learn about key gRPC concepts, find quick starts, reference
      material, and tutorials for all our supported languages, and more. If you’re new to gRPC we recommend that you read <a href="guides/"><b>What is
      gRPC?</b></a> to find out more about our system and how it works. Or, if you want to see gRPC in action first, visit the <a href="quickstart/">QuickStart</a> for your favourite language. </p>

      <h2 class="col-sm-8 doc-header">gRPC by Language</h2>
      <div class="lang-card-selector col-xs-12">
        <div class="lang-card">
          <div class="lang-card-title">C++</div>
          <a class="lang-card-link" href="quickstart/cpp.html">Quick Start Guide</a>
          <a class="lang-card-link" href="tutorials/basic/c.html">gRPC Basics Tutorial</a>
          <a class="lang-card-link" href="/grpc/cpp/index.html">API Reference</a>
        </div>
        <div class="lang-card">
          <div class="lang-card-title">Java</div>
          <a class="lang-card-link" href="quickstart/java.html">Quick Start Guide</a>
          <a class="lang-card-link" href="tutorials/basic/java.html">gRPC Basics Tutorial</a>
          <a class="lang-card-link" href="/grpc-java/javadoc/index.html">API Reference</a>
          <a class="lang-card-link" href="reference/java/generated-code.html">Generated Code Reference</a>
        </div>
        <div class="lang-card">
          <div class="lang-card-title">Python</div>
          <a class="lang-card-link" href="quickstart/python.html">Quick Start Guide</a>
          <a class="lang-card-link" href="tutorials/basic/python.html">gRPC Basics Tutorial</a>
          <a class="lang-card-link" href="/grpc/python/">API Reference</a>
          <a class="lang-card-link" href="reference/python/generated-code.html">Generated Code Reference</a>
        </div>
        <div class="lang-card">
          <div class="lang-card-title">Go</div>
          <a class="lang-card-link" href="quickstart/go.html">Quick Start Guide</a>
          <a class="lang-card-link" href="tutorials/basic/go.html">gRPC Basics Tutorial</a>
          <a class="lang-card-link" href="https://godoc.org/google.golang.org/grpc">API Reference</a>
          <a class="lang-card-link" href="reference/go/generated-code.html">Generated Code Reference</a>
        </div>
        <div class="lang-card">
          <div class="lang-card-title">Ruby</div>
          <a class="lang-card-link" href="quickstart/ruby.html#">Quick Start Guide</a>
          <a class="lang-card-link" href="tutorials/basic/ruby.html">gRPC Basics Tutorial</a>
          <a class="lang-card-link" href="http://www.rubydoc.info/gems/grpc">API Reference</a>
        </div>
        <div class="lang-card">
          <div class="lang-card-title">C#</div>
          <a class="lang-card-link" href="quickstart/csharp.html">Quick Start Guide</a>
          <a class="lang-card-link" href="tutorials/basic/csharp.html">gRPC Basics Tutorial</a>
          <a class="lang-card-link" href="/grpc/csharp/api/Grpc.Core.html">API Reference</a>
        </div>
        <div class="lang-card">
          <div class="lang-card-title">Node.js</div>
          <a class="lang-card-link" href="quickstart/node.html">Quick Start Guide</a>
          <a class="lang-card-link" href="tutorials/basic/node.html">gRPC Basics Tutorial</a>
          <a class="lang-card-link" href="/grpc/node/">API Reference</a>
        </div>
	<div class="lang-card">
          <div class="lang-card-title">Android Java</div>
          <a class="lang-card-link" href="quickstart/android.html">Quick Start Guide</a>
          <a class="lang-card-link" href="tutorials/basic/android.html">gRPC Basics Tutorial</a>
          <a class="lang-card-link" href="/grpc-java/javadoc/index.html">API Reference</a>
          <a class="lang-card-link" href="reference/java/generated-code.html">Generated Code Reference</a>
        </div>
	
        <div class="lang-card">
          <div class="lang-card-title">Objective-C</div>
          <a class="lang-card-link" href="quickstart/objective-c.html">Quick Start Guide</a>
          <a class="lang-card-link" href="tutorials/basic/objective-c.html">gRPC Basics Tutorial</a>
          <a class="lang-card-link" href="http://cocoadocs.org/docsets/gRPC/">API Reference</a>
       </div>
        <div class="lang-card">
          <div class="lang-card-title">PHP</div>
          <a class="lang-card-link" href="quickstart/php.html">Quick Start Guide</a>
          <a class="lang-card-link" href="tutorials/basic/php.html">gRPC Basics Tutorial</a>
          <a class="lang-card-link" href="/grpc/php/namespace-Grpc.html">API Reference</a>
        </div>
      </div>
    </div>
  </div>
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      <h2 class="col-sm-8 doc-header">gRPC by Use Cases</h2>
      <div class="col-sm-10 use-description">
        <p>gRPC is used in last mile of computing in mobile and web client since
        it can generate libraries for iOS and Android and uses standards based
        HTTP/2 as transport allowing it to easily traverse proxies and
        firewalls. There is also work underway to develop a JS library for use
        in browsers. Beyond that, it is ideal as a microservices interconnect,
        not just because the core protocol is very efficient but also because
        the framework has pluggable authentication, load balancing etc. Google
        itself is also transitioning to use it to connect microservices. </p>
      </div>
      <div class="lang-card-selector col-sm-10">
        <div class="lang-card">
          <div class="lang-card-title">Last Mile of Computing</div>
          <a class="lang-card-link" href="{{ site.baseurl }}/docs/tutorials/basic/objective-c.html">Mobile: Example RouteGuide Client on iOS</a>
          <a class="lang-card-link" href="{{ site.baseurl }}/docs/tutorials/basic/android.html">Mobile: Example RouteGuide Client on Android</a>
          <a class="lang-card-link" href="https://docs.google.com/forms/u/0/d/15iRDHoP-VBenc4hWgKn7bk7IirJLgs0uh88nw1vi_Hc/edit">Web *(Coming soon) - Early Access Sign Up</a>
         <!--  <a class="lang-card-link" href="{{site.baseurl}}/blog/mobile-benchmarks/">Benchmarks on mobile</a> -->

        </div>
        <div class="lang-card">
          <div class="lang-card-title">APIs</div>
          <a class="lang-card-link" href="https://github.com/GoogleCloudPlatform/cloud-bigtable-client">Google Cloud BigTable Client APIs</a>
          <a class="lang-card-link" href="https://cloud.google.com/blog/big-data/2016/03/announcing-grpc-alpha-for-google-cloud-pubsub">Google Cloud PubSub APIs</a>
          <a class="lang-card-link" href="https://cloud.google.com/speech/reference/rpc/">Google Cloud Speech APIs</a>

        </div>
        <div class="lang-card">
          <div class="lang-card-title">Microservices</div>
          <a class="lang-card-link" href="https://nghttp2.org/blog/2015/03/24/proxying-grpc-with-nghttpx/">How to use gRPC with nghttp2</a>
          <a class="lang-card-link" href="https://github.com/openzipkin/brave/tree/master/instrumentation/grpc">Tracing gRPC services using Zipkin in Java</a>
          <a class="lang-card-link" href="https://github.com/dinowernli/java-grpc-prometheus">Monitoring gRPC services using Prometheus in Java </a>
          <a class="lang-card-link" href="https://github.com/mwitkow/go-grpc-prometheus">Monitoring gRPC services using Prometheus in Go </a>
          <a class="lang-card-link" href="https://github.com/grpc/grpc/blob/master/doc/load-balancing.md">Load Balancing in gRPC</a>

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       <h2 class="col-sm-8 doc-header">gRPC in Other Projects</h2>
      <div class="row col-sm-10 use-description">
        <p>gRPC now has a vibrant community of companies, projects, developers
        who are extending and building around it. Here are some popular
        projects. </p>
      </div>
      <div class="lang-card-selector col-sm-10">
        <div class="lang-card">
          <div class="lang-card-title">Popular Projects</div>
          <a class="lang-card-link" href="https://github.com/grpc-ecosystem/grpc-gateway">gRPC Gateway</a>
          <a class="lang-card-link" href="https://github.com/grpc-ecosystem/polyglot">Polyglot: gRPC command line client</a>
          <a class="lang-card-link" href="https://github.com/google/flatbuffers/tree/master/grpc">FlatBuffer for gRPC</a>
           <a class="lang-card-link" href="https://github.com/go-kit/kit/tree/master/transport/grpc">Go kit with gRPC transport</a>
            <a class="lang-card-link" href="https://github.com/coreos/etcd">CoreOS etcd</a>
            <a class="lang-card-link" href="https://github.com/cockroachdb/cockroach">cockroachdb</a>
            <a class="lang-card-link" href="https://github.com/openzipkin/brave/tree/master/archive/brave-grpc">Zipkin for gRPC</a>
		<a class="lang-card-link" href="https://github.com/pingcap/tidb">TiDB</a>

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